Chris@16: 
Chris@16: #if !defined(BOOST_PP_IS_ITERATING)
Chris@16: 
Chris@16: ///// header body
Chris@16: 
Chris@16: #ifndef BOOST_MPL_AUX_TEMPLATE_ARITY_HPP_INCLUDED
Chris@16: #define BOOST_MPL_AUX_TEMPLATE_ARITY_HPP_INCLUDED
Chris@16: 
Chris@16: // Copyright Aleksey Gurtovoy 2001-2004
Chris@16: //
Chris@16: // Distributed under the Boost Software License, Version 1.0. 
Chris@16: // (See accompanying file LICENSE_1_0.txt or copy at 
Chris@16: // http://www.boost.org/LICENSE_1_0.txt)
Chris@16: //
Chris@16: // See http://www.boost.org/libs/mpl for documentation.
Chris@16: 
Chris@101: // $Id$
Chris@101: // $Date$
Chris@101: // $Revision$
Chris@16: 
Chris@16: #include <boost/mpl/aux_/config/ttp.hpp>
Chris@16: #include <boost/mpl/aux_/config/lambda.hpp>
Chris@16: 
Chris@16: #if !defined(BOOST_MPL_PREPROCESSING_MODE)
Chris@16: #   include <boost/mpl/aux_/template_arity_fwd.hpp>
Chris@16: #   include <boost/mpl/int.hpp>
Chris@16: #   if !defined(BOOST_MPL_CFG_NO_FULL_LAMBDA_SUPPORT)
Chris@16: #   if defined(BOOST_MPL_CFG_EXTENDED_TEMPLATE_PARAMETERS_MATCHING)
Chris@16: #       include <boost/mpl/aux_/type_wrapper.hpp>
Chris@16: #   endif
Chris@16: #   else
Chris@16: #       include <boost/mpl/aux_/has_rebind.hpp>
Chris@16: #   endif
Chris@16: #endif
Chris@16: 
Chris@16: #include <boost/mpl/aux_/config/static_constant.hpp>
Chris@16: #include <boost/mpl/aux_/config/use_preprocessed.hpp>
Chris@16: 
Chris@16: #if !defined(BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS) \
Chris@16:     && !defined(BOOST_MPL_PREPROCESSING_MODE)
Chris@16: 
Chris@16: #   define BOOST_MPL_PREPROCESSED_HEADER template_arity.hpp
Chris@16: #   include <boost/mpl/aux_/include_preprocessed.hpp>
Chris@16: 
Chris@16: #else
Chris@16: 
Chris@16: #   if !defined(BOOST_MPL_CFG_NO_FULL_LAMBDA_SUPPORT)
Chris@16: #   if defined(BOOST_MPL_CFG_EXTENDED_TEMPLATE_PARAMETERS_MATCHING)
Chris@16: 
Chris@16: #   include <boost/mpl/limits/arity.hpp>
Chris@16: #   include <boost/mpl/aux_/preprocessor/range.hpp>
Chris@16: #   include <boost/mpl/aux_/preprocessor/repeat.hpp>
Chris@16: #   include <boost/mpl/aux_/preprocessor/params.hpp>
Chris@16: #   include <boost/mpl/aux_/nttp_decl.hpp>
Chris@16: 
Chris@16: #   include <boost/preprocessor/seq/fold_left.hpp>
Chris@16: #   include <boost/preprocessor/comma_if.hpp>
Chris@16: #   include <boost/preprocessor/iterate.hpp>
Chris@16: #   include <boost/preprocessor/inc.hpp>
Chris@16: #   include <boost/preprocessor/cat.hpp>
Chris@16: 
Chris@16: #   define AUX778076_ARITY BOOST_PP_INC(BOOST_MPL_LIMIT_METAFUNCTION_ARITY)
Chris@16: 
Chris@16: namespace boost { namespace mpl { namespace aux {
Chris@16: 
Chris@16: template< BOOST_MPL_AUX_NTTP_DECL(int, N) > struct arity_tag
Chris@16: {
Chris@16:     typedef char (&type)[N + 1];
Chris@16: };
Chris@16: 
Chris@16: #   define AUX778076_MAX_ARITY_OP(unused, state, i_) \
Chris@16:     ( BOOST_PP_CAT(C,i_) > 0 ? BOOST_PP_CAT(C,i_) : state ) \
Chris@16: /**/
Chris@16: 
Chris@16: template<
Chris@16:       BOOST_MPL_PP_PARAMS(AUX778076_ARITY, BOOST_MPL_AUX_NTTP_DECL(int, C))
Chris@16:     >
Chris@16: struct max_arity
Chris@16: {
Chris@16:     BOOST_STATIC_CONSTANT(int, value = 
Chris@16:           BOOST_PP_SEQ_FOLD_LEFT(
Chris@16:               AUX778076_MAX_ARITY_OP
Chris@16:             , -1
Chris@16:             , BOOST_MPL_PP_RANGE(1, AUX778076_ARITY)
Chris@16:             )
Chris@16:         );
Chris@16: };
Chris@16: 
Chris@16: #   undef AUX778076_MAX_ARITY_OP
Chris@16: 
Chris@16: arity_tag<0>::type arity_helper(...);
Chris@16: 
Chris@16: #   define BOOST_PP_ITERATION_LIMITS (1, AUX778076_ARITY)
Chris@16: #   define BOOST_PP_FILENAME_1 <boost/mpl/aux_/template_arity.hpp>
Chris@16: #   include BOOST_PP_ITERATE()
Chris@16: 
Chris@16: template< typename F, BOOST_MPL_AUX_NTTP_DECL(int, N) >
Chris@16: struct template_arity_impl
Chris@16: {
Chris@16:     BOOST_STATIC_CONSTANT(int, value = 
Chris@16:           sizeof(::boost::mpl::aux::arity_helper(type_wrapper<F>(),arity_tag<N>())) - 1
Chris@16:         );
Chris@16: };
Chris@16: 
Chris@16: #   define AUX778076_TEMPLATE_ARITY_IMPL_INVOCATION(unused, i_, F) \
Chris@16:     BOOST_PP_COMMA_IF(i_) template_arity_impl<F,BOOST_PP_INC(i_)>::value \
Chris@16: /**/
Chris@16: 
Chris@16: template< typename F >
Chris@16: struct template_arity
Chris@16: {
Chris@16:     BOOST_STATIC_CONSTANT(int, value = (
Chris@16:           max_arity< BOOST_MPL_PP_REPEAT(
Chris@16:               AUX778076_ARITY
Chris@16:             , AUX778076_TEMPLATE_ARITY_IMPL_INVOCATION
Chris@16:             , F
Chris@16:             ) >::value
Chris@16:         ));
Chris@16:         
Chris@16:     typedef mpl::int_<value> type;
Chris@16: };
Chris@16: 
Chris@16: #   undef AUX778076_TEMPLATE_ARITY_IMPL_INVOCATION
Chris@16: 
Chris@16: #   undef AUX778076_ARITY
Chris@16: 
Chris@16: }}}
Chris@16: 
Chris@16: #   endif // BOOST_MPL_CFG_EXTENDED_TEMPLATE_PARAMETERS_MATCHING
Chris@16: #   else // BOOST_MPL_CFG_NO_FULL_LAMBDA_SUPPORT
Chris@16: 
Chris@16: #   include <boost/mpl/aux_/config/eti.hpp>
Chris@16: 
Chris@16: namespace boost { namespace mpl { namespace aux {
Chris@16: 
Chris@16: template< bool >
Chris@16: struct template_arity_impl
Chris@16: {
Chris@16:     template< typename F > struct result_
Chris@16:         : mpl::int_<-1>
Chris@16:     {
Chris@16:     };
Chris@16: };
Chris@16: 
Chris@16: template<>
Chris@16: struct template_arity_impl<true>
Chris@16: {
Chris@16:     template< typename F > struct result_
Chris@16:         : F::arity
Chris@16:     {
Chris@16:     };
Chris@16: };
Chris@16: 
Chris@16: template< typename F >
Chris@16: struct template_arity
Chris@16:     : template_arity_impl< ::boost::mpl::aux::has_rebind<F>::value >
Chris@16:         ::template result_<F>
Chris@16: {
Chris@16: };
Chris@16: 
Chris@16: #if defined(BOOST_MPL_CFG_MSVC_ETI_BUG)
Chris@16: template<>
Chris@16: struct template_arity<int>
Chris@16:     : mpl::int_<-1>
Chris@16: {
Chris@16: };
Chris@16: #endif
Chris@16: 
Chris@16: }}}
Chris@16: 
Chris@16: #   endif // BOOST_MPL_CFG_NO_FULL_LAMBDA_SUPPORT
Chris@16: 
Chris@16: #endif // BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS
Chris@16: #endif // BOOST_MPL_AUX_TEMPLATE_ARITY_HPP_INCLUDED
Chris@16: 
Chris@16: ///// iteration
Chris@16: 
Chris@16: #else
Chris@16: #define i_ BOOST_PP_FRAME_ITERATION(1)
Chris@16: 
Chris@16: template<
Chris@16:       template< BOOST_MPL_PP_PARAMS(i_, typename P) > class F
Chris@16:     , BOOST_MPL_PP_PARAMS(i_, typename T)
Chris@16:     >
Chris@16: typename arity_tag<i_>::type
Chris@16: arity_helper(type_wrapper< F<BOOST_MPL_PP_PARAMS(i_, T)> >, arity_tag<i_>);
Chris@16: 
Chris@16: #undef i_
Chris@16: #endif // BOOST_PP_IS_ITERATING